KR102161124B1 - Solid Type Sun Screening Cosmetic Composition - Google Patents

Abstract

As a solid sunscreen cosmetic composition, based on the total weight of the composition, based on the total weight of the water phase component 15 to 30% by weight, UV protection component 5 to 35% by weight, oil 15 to 27% by weight, wax 15 to 30% by weight and emulsifier 0.05 to It provides a solid UV-blocking cosmetic composition comprising 3% by weight and a method of manufacturing the same.

Description

Solid type sun screening cosmetic composition TECHNICAL FIELD

The present invention relates to a solid sunscreen cosmetic composition, which has a solid formulation and contains a high content of water.

As the amount of ultraviolet rays reaching the surface increases due to the destruction of the ozone layer, the market for sunscreen agents is growing rapidly in recent years. Sunscreens have been included in cosmetics that are used on a daily basis, such as toners and lotions.

UV rays reaching the surface are divided into UVA (320-390 nm) and UVB (290-320 nm) depending on the wavelength. Among them, UVA is a light with a longer wavelength than UVB. It is known to be a direct cause of skin aging as it reaches the dermal layer of and affects the connective tissue of the skin, such as collagen.

In this way, as the importance of UVA protection increases, the regulations for extending the existing UVA protection index rating from 3 to 4 have been in effect from January 2013 in Japan and from December 2016 in Korea and China. .

In addition, ultraviolet rays near the UVA region and blue light, which is visible light, refer to short wavelength light with a wavelength of 380 to 500 nm, and'Violet light down-regulates the expression of specific differentiation markers through Rhodopsin in normal human epidermal keratinocytes, PLoS One. 2013 Sep 17;8(9)e73678' reveals that energy is small compared to ultraviolet rays such as UVB, but it is harmful due to high skin permeability.In the blue light range, violet light (410 nm) is used in keratinocytes of the skin. By overexpressing the mRNA of rhodopsin among the expressed photoreceptors, phosphorylation of CREB (cAMP esponsive element binding protein) is reduced, and the mRNA expression levels of Keratin-10 (K10) and Keratin-1 (K1), which are differentiation markers of specific keratinocytes, are reduced. Therefore, it has been reported to reduce the differentiation of human keratinocytes and delay the recovery of damaged skin barriers.

In this way, as the dangers of visible light in the ultraviolet and near-ultraviolet regions are widely known, the demand for UV protection continues to increase, and in order to meet the needs of various consumers, spray type and spray type and Cosmetics of various formulations such as solid type have been developed.

Since the sunscreen must be reapplied every 3-4 hours to see the sunscreen effect, a new formulation of sunscreen cosmetics was developed to make it easy to reapply anytime, anywhere, and to apply meticulously. Solid formulations such as type or balm type are gaining great popularity.

However, in the case of such solid type cosmetics, oil-based cosmetics or water-in-oil (W/O) cosmetics are used to ensure that the solid formulation is implemented for the quality or completeness of the product, but is not deformed by external factors such as temperature change or moisture. There was a problem that was inevitable to manufacture.

Republic of Korea Patent No. 10-1756697 regarding an oil-in-water type solidified UV-blocking cosmetic composition discloses a technology for implementing a stable formulation including sodium stearate, but sodium stearate has a high pH and a characteristic sticky Due to the feeling of use, there is a problem that is unsuitable for use in sunscreen cosmetics mainly used on the face.

Meanwhile, Korean Patent No. 10-1549590 discloses a solid stick cosmetic composition containing a water-soluble moisturizing component using a porous powder, and discloses a configuration including a water-soluble moisturizing component in the porous powder in the form of an emulsion. Due to its characteristics, a high-temperature process of manufacturing cosmetics and filling a container is involved, and there is no disclosure of a technology that can prevent moisture from evaporating over time due to natural phenomena.

Korean Patent Registration No. 10-1454199 discloses a stick-type sunscreen cosmetic composition containing a polyamide-based gelling agent, but relates to an oily cosmetic composition containing only an organic sunscreen.

Thus, the present inventors have implemented a solid formulation of sun protection cosmetics that can block ultraviolet rays of a wide range of wavelengths, while a high content of moisture is contained, and a high content of moisture is maintained for a long period of time, giving a refreshing feeling while using a refreshing, non-sticky cosmetic. It has come to the development of a solid-type sunscreen cosmetic with a feeling of use.

1. Korean Patent Registration No. 10-1756697 2. Korean Patent Registration No. 10-1549590 3. Korean Patent Registration No. 10-1454199

1. Violet light down-regulates the expression of specific differentiation markers through Rhodopsin in normal human epidermal keratinocytes, PLoS One. 2013 Sep 17;8(9) e73678

An object of the present invention is to solve the problems of the prior art and technical problems that have been requested from the past.

An object of the present invention is to provide a solid UV-blocking cosmetic composition including all of various types of sun-blocking agents so as to have a blocking effect on visible light in the near-ultraviolet region while widely blocking ultraviolet rays of various wavelengths.

In addition, it is an object of the present invention to provide a solid UV-blocking cosmetic composition containing a high content of moisture by improving the stuffy feeling or sticky feeling, which is a problem with the existing solid formulation of UV-blocking cosmetics.

The present invention provides a solid UV-blocking cosmetic composition having a stable formulation while containing a high content of moisture, suppressing the sweating phenomenon at a high temperature, not evaporating a high content of moisture, and maintaining the effect for a long period of time. It aims to do.

Another object of the present invention is to provide a method for preparing a solid sunscreen cosmetic composition according to the present invention.

Solid sunscreen cosmetic composition according to the present invention for solving the above problems, based on the total weight of the composition, 15 to 30% by weight of the water phase component, 5 to 35% by weight of the sunscreen component, 15 to 27% by weight of oil, It provides a solid UV-blocking cosmetic composition comprising 15 to 30% by weight of a wax and 0.05 to 3% by weight of an emulsifier.

In the present invention, the aqueous component provides a solid sunscreen cosmetic composition comprising at least one selected from the group consisting of water, polyol, and aqueous thickener.

Specifically, the aqueous phase component is water or a polyol/aqueous thickener aqueous solution, and the polyol/aqueous thickener aqueous solution contains water, a polyol and a water based thickener from 10 to 16: 3 to 7: 0.1 to 0.8 by weight It provides a solid sunscreen cosmetic composition, characterized in that mixed in a ratio.

In the present invention, the sunscreen component provides a solid sunscreen cosmetic composition, characterized in that the mixture of an organic sunscreen and an inorganic sunscreen.

In the present invention, the solid sunscreen cosmetic composition is a solid sunscreen cosmetic composition, characterized in that the formulation is a compact type, a stick type, a balm type, or a bar type. to provide.

In the present invention, the polyol is glycerin, glyceryl-26, propylene glycol, butylene glycol, dipropylene glycol, methylgluces-10, methylgluces-20, PEG-8, PEG -32, PG-75, raffinose, inositol, sorbitol and maltitol may be one or more selected from the group consisting of, the aqueous thickener is sodium polyacrylate, acrylate / C10-30 alkyl acrylate crosspolymer , Ammonium acryloyl dimethyl taurate, ammonium acrylate copolymer, VP copolymer, acrylate copolymer, it provides a solid UV-blocking cosmetic composition, characterized in that at least one selected from the group consisting of glyceryl acrylate.

In the present invention, when the sunscreen component is a mixture of an organic sunscreen and an inorganic sunscreen, the inorganic sunscreen may be at least one selected from the group consisting of titanium dioxis and zinc oxide, and the inorganic sunscreen is average It has a particle diameter of 0.1 to 100 μm (micrometer), has a core-shell structure with a moisture-repellent coating layer formed on the surface, and the moisture-repellent coating layer is a pH adjuster, an aqueous thickener, and caprylic/caprylglycer. It provides a solid sunscreen cosmetic composition, characterized in that it comprises a mixture of ride and 1: 2: 10 to 30 weight ratio mixed.

The present invention also provides a method for preparing a solid UV-blocking cosmetic composition, comprising: a heating and mixing step of heating and mixing an oil-phase portion including a UV-blocking component, an oil, a wax, and an emulsifying agent and an aqueous portion including an aqueous phase component; An emulsification step of obtaining an emulsified emulsion by placing the mixed oil phase portion and the mixed aqueous phase portion obtained in the heating and mixing step into a single container and heating and stirring; A cooling step of degassing and cooling the emulsion obtained in the emulsification step to obtain a cooled product; And a filling step of heating the coolant obtained in the cooling step to fill the container and cool it. It provides a method for producing a solid UV-blocking cosmetic composition comprising a.

The present invention has high formulation stability of an organic sunscreen agent and an inorganic sunscreen agent, broadly blocks ultraviolet rays of various wavelengths, and has a blocking effect against visible light in the near ultraviolet region.

The present invention contains a high content of moisture, so that the skin is not stuffy and has a refreshing feeling even when it is applied indirectly to the skin by rubbing it on the skin or using a tool, thereby improving the feeling of use of a solid UV-blocking cosmetic.

The present invention also includes a high content of moisture, thereby providing a feeling of moisture to the skin in addition to the UV blocking effect.

The present invention has the effect of implementing a sunscreen cosmetic composition in a solid dosage form, containing a high content of moisture, maintaining a high content of moisture for a long time without evaporation, and inhibiting the sweating phenomenon at high temperatures.

1 is an image showing the results of a photostability confirmation experiment for cosmetics of Examples and Comparative Examples.

Hereinafter, each configuration will be described in more detail, but this is only an example, and the scope of the present invention is not limited by the following content.

The present invention is characterized in that it contains a higher content of moisture than a conventional solid sunscreen cosmetic containing an aqueous component. It contains such a high content of moisture and relates to a solid sunscreen cosmetic composition that is maintained without evaporation of moisture even after a long period of time has passed.

The solid sunscreen cosmetic composition according to the present invention is based on the total weight of the composition, based on the total weight of the aqueous component 15 to 30% by weight, UV protection component 5 to 35% by weight, oil 15 to 27% by weight, wax 15 to 30% by weight and It is a solid sunscreen cosmetic composition containing 0.05 to 3% by weight of an emulsifier.

In particular, the present invention is characterized by having a stable solid formulation while containing a UV-blocking component and a high content of water. This is obtained by mixing the above ingredients in a specific amount.

In order to achieve the basic function of the sunscreen effect of the solid sunscreen cosmetic composition according to the present invention, a sunscreen component is included in an amount of 5 to 35% by weight. Preferably, it may be included in 10 to 33% by weight, most preferably, 20 to 31% by weight.

If it is added in a small amount than the above content, there is a problem that it does not have a UV-blocking effect as much as a sun-blocking cosmetic, and if it is added in excess than the above content, the cosmetic material feels like a cosmetic on the skin surface after being applied to the skin. Or there is a problem that the feeling of use becomes heavy, and there is a problem that the formulation becomes unstable.

The UV blocking component may be an organic UV blocking component and/or an inorganic UV blocking component, most preferably a mixture of an organic UV blocking component and an inorganic UV blocking component.

More specifically, the organic UV blocking component may include at least one selected from the group consisting of a UVA area blocker, a UVB area blocker, and a UVA/UVB area blocker, preferably, a UVA area blocker, a UVB area blocker, and It may be a mixture of UVA/UVB area blockers.

The UVA area blockers are butylmethoxydibenzoylmethane (avobenzone), diethylaminohydroxybenzoylhexylbenzoate, disodiumphenyldibenzimidazoletetrasulfonate, dromethrizoltrisiloxane, menthylanthranylate, and methylenebis -It may be one or more selected from the group consisting of benzotriazolyltetramethylbutylphenol, and the UVB blocker is benzophenone-3, benzophenone-4, polysilicon-15, ethylhexylmethoxycinnamate, ethylhexylsalicil Rate, ethylhexyl trizone, homosalate, isoamyl-p-methoxycinnamate, octocrylene, phenylbenzimidazole sulfonic acid, and trisbiphenyltriazine may be one or more selected from the group consisting of, and the The UVA/UVB area blocker may be terephthalylidenedicamphorsulphonic acid, bis-ethylhexyloxyphenolmethoxyphenyltriazine.

Meanwhile, the inorganic UV blocking component may be at least one selected from the group consisting of titanium dioxide and zinc oxide.

In particular, the inorganic UV blocking component may be a particle having an average diameter of 0.1 to 100 μm (micrometer), and preferably a particle having an average diameter of 1 to 50 μm (micrometer).

When the diameter is larger than the average diameter, there is a problem that the ultraviolet blocking effect is small and the clouding phenomenon occurs severely, and when the diameter is smaller than the average diameter, there is a problem that the skin pores are clogged and trouble occurs.

In the present invention, the inorganic UV-blocking component is a moisture-repellent coating layer comprising a mixture of a pH adjuster, an aqueous thickener, and caprylic/caprylglyceride in a weight ratio of 1: 2: 10 to 30 on the surface of the particle. It is characterized by having a core-shell structure formed on the surface.

The moisture-repellent coating layer is a coating layer with high moisture and binding power on the surface of the inorganic sunscreen, and water molecules in the solid cosmetic are present in a state surrounded by the moisture-repellent coating layer. It has the effect of suppressing the evaporation of moisture in the solid cosmetic composition rather than randomly dispersed components such as oil and sunscreen.

In the solid cosmetic state, the problem of evaporation of moisture or elution from the surface of the solid cosmetic is suppressed, and moisture is not evaporated for a long time even in a room temperature and high temperature environment, and there is an effect that it can remain in the cosmetic.

When applied to the skin surface and applied in the form of a thin film, the power to suppress evaporation of water is less than when the entire surface of the water molecule is surrounded by a moisture-repellent coating layer in a solid state, so it evaporates from the skin surface and gives a refreshing feeling of use.

Moreover, in the case of an inorganic sunscreen, if it is added in an excessive amount, the feeling of use is stiff when applied to the skin, but when the inorganic sunscreen having a core-shell structure with a moisture-repellent coating layer according to the present invention is used, the solid cosmetic is in contact with the skin. It has the advantage of applying smoothly even if you rub it with.

In the mixture included in the moisture-repellent coating layer, when the pH adjusting agent is added in an excessive amount, there is a problem that the moisture-resistance is lowered or the moisture is not maintained in a high content for a long period of time, and when it is added in a small amount than the above content , There is a problem that the coating layer is not formed.

The pH adjusting agent may be a basic substance such as triethanolamine, sodium hydroxide (NaOH), arginine, potassium hydroxide (KOH), or the like.

In the solid UV-blocking cosmetic composition according to the present invention, the aqueous component means water and/or a hydrophilic material, and in the present invention, it may include at least one selected from the group consisting of water, polyol, and aqueous thickener. And, preferably, it may be water or a polyol / aqueous thickener aqueous solution.

In particular, in the case of the polyol/water-based thickener aqueous solution, water, polyol, and water-based thickener may be mixed in a weight ratio of 10 to 16: 3 to 7: 0.1 to 0.8, and preferably, 10 to 16: 4 ~6: may be mixed in a weight ratio of 0.2 to 0.7, most preferably, 10 to 16: 4.2 to 5.5: 0.3 to 0.5.

When water, polyol, and aqueous thickener are mixed in a specific ratio as described above, there is an advantage in that the amount of water retention in the solid cosmetic is increased. The meaning of the water retention amount refers to the total content of moisture contained in the cosmetic composition finally obtained.

In general, cosmetics are composed of a composition in which various constituents are mixed. In particular, in the case of including both an oily phase and an aqueous phase as in the present invention, a heating process is involved to emulsify them, and a large amount of moisture is evaporated during this process. The cosmetic composition finally obtained has a problem in that the moisture content is reduced. Moreover, in the case of solid cosmetics, since the process of heating may be additionally involved in the process of molding into a desired shape, there is a problem in that the amount of evaporated moisture may be further increased. When a mixture of a polyol and an aqueous thickener is included in the aqueous phase component, the amount of water that can be evaporated during the manufacturing process can be greatly reduced, thereby increasing the amount of water retention after manufacturing.

In the case of adding polyol in excess of the above content, as the moisture content becomes relatively small, there is a problem that the moisture retention of the final cosmetic material is greatly reduced, and in particular, the refreshing feeling that can be felt after applying the solid cosmetic material to the skin is greatly increased. There is a shrinking problem.

In the case of adding an aqueous thickener in excess of the above content, there is a problem in that the finished solid cosmetic is not applied well when it is applied to the skin surface, or a thick film is formed even if applied, so that the user may feel frustrated.

The polyol is glycerin, glyceres-26, propylene glycol, butylene glycol, dipropylene glycol, methylgluces-10, methylgluces-20, PEG-8, PEG-32, PEG It may be one or more selected from the group consisting of -75, raffinose, inositol, sorbitol, and maltitol.

The aqueous thickener is carbomer, sodium polyacrylate, acrylate/C10-30 alkyl acrylate crosspolymer, acrylamide/sodium acrylate copolymer/trideceth-6/mineral salt, and ammonium acryloyldimethyltau Rate, acrylate, ammonium acrylate copolymer, vpicopolymer, acrylate copolymer, glyceryl acrylate, acrylic acid copolymer, lithium magnesium sodium silicate, hydroxyethylcellulose, polyacrylamide, montmorillonite, cetylhydroxy Ethyl cellulose, agar, octyl acrylamide copolymer, cellulose, polyacrylate-13, corn starch, PEG-240/HDI copolymer bis-decyltetradeces-20 ether, octyl acrylamide copolymer, mannan, From the group consisting of gellan gum, aluminum starch octenyl succinate, xanthan gum, carob bean gum, sodium acryloyl dimethyl taurate copolymer, sodium polyacrylate starch, and sodium stearoxy sebum-hydroxyethylcellulose sulfonate It may be one or more selected, preferably, sodium polyacrylate, acrylate / C10-30 alkyl acrylate crosspolymer, ammonium acryloyl dimethyl taurate, ammonium acrylate copolymer, VP copolymer, acrylate copolymer , It may be one or more selected from the group consisting of glyceryl acrylate.

On the other hand, the aqueous phase component may be included in 15 to 30% by weight, preferably 17 to 27% by weight, most preferably 19 to 25% by weight based on the total weight of the composition.

In the present invention, the content of the aqueous phase component is maintained at a high content in the final finished solid sunscreen cosmetic. If it is added in a smaller amount than the above content, it is difficult to feel the refreshing feeling or refreshing sensation felt on the skin when using a cosmetic because it is partially evaporated in the manufacturing step, or moisture is lost over time and the content of moisture remaining in the cosmetic is greatly reduced. There is.

If the aqueous component is added in excess of the above content, there is a problem in that it is difficult to uniformly mix with the oily component in the manufacturing step of the cosmetic, and in particular, it is difficult to manufacture in a solid formulation, or even if it is possible to manufacture, the hardness is significantly low, There is a problem that is unsuitable for use as a cosmetic.

In the present invention, the oil may be a silicone oil and an ester-based oil, and specifically, the silicone oil is cyclomethicone, cyclopentasiloxane, cyclohexasiloxane, phenyltrimethicone, dimethicone, dimethiconol, cetyldimethicone It may be one or more selected from the group consisting of chicon, caprylyl methicone, amodimethicone, methyl trimethicone, PCAD methicone, and trisiloxane.

The ester oils are caprylic/caprylglyceride, cetearylethylhexanoate, isopropylmyristate, isocetylstearate, octyldodecanol, methylperfluoroisobutylether, C12-15 alkyl Benzoate, triethylhexanoin, cetylethylhexanoin, cholesterylhydroxystearate, diisostearylmalate, isotridecylisononanoate, isononylsononanoate, neopentylglycodica Prate, di(C12-13)alkylmaleate, butylene glycol dicaprylate/dicaprate, butyloctyl salicylate, hydrogenated poly(C6-14 olefin), hydrogenated polydecene, cetyl ethylhexa It may be one or more selected from the group consisting of noate, tribehenin, tricapryline, diethoxyethylsuccinate, and tricapryline.

In the present invention, the oil is more preferably a mixture of silicone oil and ester oil.

The present invention may further include vegetable oils, mineral oils, etc., in addition to the above oil components, and specifically, the vegetable oils are safflower seed oil, olive oil, jojoba seed oil, avocado oil, macadamia seed oil, rosehip fruit Oil, meadow foam seed oil, tea tree leaf oil, squalane, grape seed oil, rice bran oil, sweet almond oil, American hazel seed oil, mountain birch oil, camellia oil, almond oil, oil palm oil, sunflower seed oil and bazaar oil It is at least one selected from the group consisting of, and the animal oil is at least one selected from the group consisting of horsefat, mink oil, egg yolk oil, and squalane, and the mineral oil is from the group consisting of mineral oil, isododecane, polybutene and petrolatum. It may be one or more selected.

The oil may be included in 15 to 27% by weight, based on the total weight of the cosmetic composition according to the present invention. When it is added in excess of the above content, there is a problem that the skin feels stuffy after being applied to the skin, and when it is added in a smaller amount than the above content, there is a problem that the spreadability is inferior.

In the present invention, the wax is at least one selected from the group consisting of plant-based wax, candelilla wax, carnauba wax, rice wax, mineral wax, ozokerite, ceresin wax, petroleum wax, paraffin wax, and polyethylene wax. Can be.

The wax may be included in an amount of 15 to 30% by weight based on the total weight of the cosmetic composition according to the present invention. Preferably, it may be included in 20 to 27% by weight. If it is added in excess than the above content, there may be a disadvantage in that the hardness is high and the spreadability is poor. If it is added in a small amount than the above amount, there may be a disadvantage that the formulation becomes soft and broken or collapsed.

Since the solid UV-blocking cosmetic composition according to the present invention includes both an aqueous phase component and an oil phase component, an emulsifier is further included. Specifically, the emulsifier may be included in an amount of 0.05 to 3% by weight, preferably, 0.1 to 2% by weight, most preferably 0.2 to 1% by weight.

When the emulsifier is included in a small amount than the above content, it is difficult to act as an emulsifier, so that the formulation stability is deteriorated, and when it is added in an excessive amount, the bravery becomes heavy and there is a disadvantage of showing a sticky feeling.

In the present invention, the emulsifier may be one or more emulsifiers selected from oil-in-water (O/W) type emulsifiers, water-in-silicone (W/S) type emulsifiers and solubilization type emulsifiers.

Specifically, the oil-in-water type emulsifier is polysorbate 20, polysorbate 60, polysorbate 80, glyceryl stearate, PEG-100 stearate, sorbitan stearate, sorbitansquioleate, PEG- 7 Glyceryl Cocoate, Cetrimonium Chloride, Lauryl Phosphate, PEG-40 Stearate, PEG-5 Glyceryl Stearate, PEG-23 Stearate, Sucrose Stearate, Batyl Alcohol, Olive Oil Peel Easy-7 ester, PEG-150 stearate, polyglyceryl-3 methylglucose distearate, glycerylolivate, sorbitanolibate, ceteareth-30, steareth-20, PEG-12 diisosteare ??, PEG-8 diisostearate, PEG-10 isostearate, cetyl alcohol, PEG-4 ceteth-20, hydrogenated lecithin, hydrogenated olive oil laurator, poly It may be at least one selected from the group consisting of sorbate 85, sorbes-30 tetraolibate, hydrogenated polyisobutene, myristylmyristate, steareth-2, and steareth-21.

In addition, water-in-silicone (W/S) type emulsifiers are lauryl PEG, PPG-18, 18 dimethicone, PEG-7 dimethicone, PEG-10 dimethicone, and cetyl PEG-10 dimethicone. Chicon, PEG-3 Dimethicone, PPG-19 Dimethicone, Lauryl PEG-9 Polydimethylsiloxyethyldimethicone, Polyglyceryl-4 Isostearate, PEG-8 Dimethicone, PEG -7 Dimethicone, Polyglyceryl-3 Polydimethylsiloxyethyldimethicone, PG-11 Methyldeterdimethicone Polyglyceryl-3 Polydimethylsiloxyethyldimethicone and Lauryl Polyglyceryl-3 It may be one or more selected from the group consisting of polydimethylsiloxyethyldimethicone.

Solubilization type emulsifiers include PEG-20 hydrogenated castor oil, PEG-40 hydrogenated castor oil, PEG-60 hydrogenated castor oil, C12-14 pares-12, polyglyceryl-19 laurate, Polyglyceryl-10 Myristate, Coles-14, Coles-20, Coles-24, PEG-20 glyceryl triisostearate, octyldodeces-16, polyglyceryl-10 oleate, polyglycerides It may be one or more selected from the group consisting of reel-4 caprate, and ceteth-10.

Preferably, a water-in-silicone emulsifier may be included, and in this case, the preferred water-in-silicone emulsifier may be PEG-10 dimethicone.

The solid sunscreen cosmetic composition according to the present invention may be a compact type, a stick type, a balm type, or a bar type. In particular, a preferred formulation may be a stick type or a bar type, and may be used by a user by rubbing a solid cosmetic material directly in contact with the skin.

As described above, the solid UV-blocking cosmetic composition according to the present invention has the effect of applying the cosmetic only by the user's body temperature and fine irregularities on the surface of the user's skin by contacting the skin. A thin film is formed to prevent the evaporation of water, so that evaporation of moisture is immediately suppressed, and the shape is maintained without being crushed when not in use.

The present invention also provides a method for preparing the above solid UV-blocking cosmetic composition.

Specifically, a heat-mixing step of heating and mixing the oil-phase part including the UV-blocking component, oil, wax and emulsifier and the water-phase part including the water-phase component, respectively, and the mixed oil-phase part and the mixed water-phase part obtained in the heating and mixing step in one container The emulsification step of obtaining an emulsified emulsion by heating and stirring in the emulsification step, a cooling step of obtaining a cooling product by degassing and cooling the emulsion obtained in the emulsification step, and heating the cooling product obtained in the cooling step, filling the container, and cooling it. Includes a filling step.

In the above manufacturing method, for each configuration, reference may be made to the above-described technical configuration.

However, in the present invention, the heating and mixing step and the emulsification step are characterized in that heating to a temperature range of 70 to 85 ℃ to prevent evaporation of the aqueous phase component. The constituents of the solid UV-blocking cosmetic composition according to the present invention can be sufficiently mixed even if the oily component and the aqueous phase component are each mixed and heated at the above temperature and stirred to minimize moisture that may be lost during the manufacturing process, and the mixed components It is characterized in that the affinity with water is maintained excellently, and a high content of moisture is maintained for a long period of time.

In addition, the manufacturing method may be used with reference to techniques generally used in the art.

Hereinafter, the present invention will be described in more detail based on examples, but the scope of the invention is not limited thereto.

1. Preparation of cosmetic composition

In order to compare the present invention with the existing solid type sunscreen cosmetics, a cosmetic composition was prepared with the composition shown in Table 1 below. In the case of Comparative Example 1, an anhydrous formulation was prepared in the conventional market, and in the case of Comparative Example 2, a formulation using the existing sodium stearate was prepared.

Raw material name Comparative example Example One 2 3 4 5 6 7 One 2 3 UV protection ingredients Avobenzone 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 Bis-ethylhexyloxyphenolmethoxyphenyltriazine 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 Ethylhexylmethoxycinnamate 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 Ethylhexylsalicylate 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 Benzophenone-3 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 Diethylaminohydroxybenzoylhexylbenzoate 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Octocrylene - - 7 - - - - - - - Titanium dioxide 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 Emulsifier PEG-10 Dimethicone - - 1.0 1.0 1.0 1.0 1.0 0.5 0.5 1.0 Wax Polyethylene 5.0 5.0 5.0 5.0 7.0 5.0 3.0 5.0 5.0 5.0 Carnauba wax 5.0 5.0 5.0 5.0 7.0 5.0 3.0 5.0 5.0 5.0 Paraffin wax 10.0 10.0 10.0 10.0 13.0 10.0 5.0 10.0 10.0 10.0 Dibutyllauroyl Glutamide 5.0 5.0 5.0 5.0 5.0 5.0 3.0 5.0 5.0 5.0 oil Dimethicone 5.0 5.0 5.0 7.0 5.0 3 5.0 5.0 5.0 5.0 Caprylic/Caprylglyceride Balance 20 20 25 20 11 20 20 20 20 Award Purified water - Balance Balance Balance Balance Balance Balance Balance Balance Balance glycerin - 3.0 2.0 2.0 2.0 4.8 4.8 2 3.0 3.0 Butylene Glycol - 2.0 1.3 1.3 1.3 2.5 2.5 1.3 2.0 2.0 Thickener Ammonium Acryl Dimethyl Taurate/VP Copolymer - 0.2 0.15 0.15 0.15 0.3 0.3 0.15 0.2 0.2 Sodium polyacrylate, acrylate/C10-30 alkyl acrylate crosspolymer - 0.5 0.1 0.1 0.1 0.3 0.3 0.1 0.2 0.2 corrector Triethanolamine - 0.2 0.2 0.2 0.2 0.3 0.3 0.2 0.2 0.2 Sodium stearate - 3.0 - - - - - - - - Preservative Phenoxy ethanol Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Hydroxyacetophenone Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount

After dispersing the oil phase at 5,000 rpm for 5 minutes using a homomixer (HOMOGENIZING MXER Model 2.5 PRIX, Japan), the aqueous phase dispersed at 5,000 rpm was slowly added over 5 minutes for primary emulsification and then secondary dispersion. The specific manufacturing process is as follows.

① Precisely measure the components of the oil phase including ultraviolet ray blocking components, emulsifiers, waxes and oils, put them in a container, and dissolve them by heating at 85 ℃ using an azimixer and a hot plate.

② After accurately weighing the components of the water phase, put purified water and polyol into a container, mix them using an azimixer, add a thickener to disperse, and add a neutralizing agent to warm to 85 ℃.

③ The oil phase part obtained in ① above and the water phase part obtained in ② are heated to about 75℃, mixed, and uniformly emulsified using a homomixer.

④ After the emulsification is complete, add a preservative and mix uniformly, then degas and cool the contents.

⑤ When filling, warm evenly to 80℃ and slowly fill the stick container.

⑥ Cool the filled container at room temperature.

On the other hand, Example 4 was prepared in the same composition as Example 3, but titanium dioxide was prepared in a triethanolamine, an aqueous thickener and caprylic/caprylglyceride based on the weight of triethanolamine, in a weight ratio of 1:2:20. It was prepared in the same manner, except that the amount was weighed and mixed separately, and then added to the emulsion passed through the step ③ and stirred.

2. Performance test of cosmetic composition

2.1. Formulation stability test

For Comparative Examples and Examples, the temperature conditions were sequentially changed at a temperature of 25°C, 4°C, and 50°C, and the hardness change and visual stability tests were performed after storage on each day, the next day, one week, and a month, and the results are shown in Table 2. Shown in.

In the case of Comparative Example 3, emulsification was not well performed in the process of mixing the oil phase part and the water phase part, and even if it was emulsified by additional stirring, it was re-separated within 40 minutes, so that a cosmetic composition could not be prepared. The cosmetic composition could not be manufactured because it did not work well. On the other hand, in the case of Comparative Example 5, as the wax component having a high viscosity was included in a large amount, it took some time in the process of mixing the oily part, and there was a problem that it was not sufficiently melt-mixed by heating in the range of 75 to 85°C. . As water is included, the moisture content can be rapidly decreased when heated to about 100° C., so it was impossible to prepare a cosmetic by adding an excessive amount of wax.

As can be seen from Table 2, in the case of Examples 1, 2, 3 and 4, it was confirmed that a stable formulation was formed under long-term stability and harsh conditions. It was confirmed that stability equal to or greater than that of the existing anhydrous stick type formulation was secured. In addition, in the formulation using sodium stearate of Comparative Example 2, it was observed that the cutting strength decreased over time, and sweating of moisture occurred at high temperature.

In Comparative Example 6, it was confirmed that the cut strength measured immediately after preparation was very low, and thus it was formed into a semi-solid formulation. When the cosmetic composition of Comparative Example 6 was checked the next day, it was confirmed that it was formed in a formulation similar to a sorbet formulation that could not be seen as a solid, and thus could not be used as a solid cosmetic.

Comparative Example 7 has a problem that the cutting strength is significantly lowered as time passes, and in particular, it was confirmed that the sweating phenomenon occurred on the surface of the solid cosmetic under high temperature conditions after a week.

Analysis conditions: SUN RHEO METER 8 ADAPTER 1.0cm 10.0 mm/s

division Comparative example Example exam Measurement date Temperature(℃) One 2 6 7 One 2 3 4 Viscosity day 25 210 210 100 180 210 215 215 215 Next day 25 210 200 - 180 220 220 215 210 1 week later 25 215 200 - 170 210 220 218 210 4 215 205 - 170 215 215 220 215 50 210 180 - 150 210 220 215 218 A month later 25 215 175 - 150 210 220 215 218 4 218 170 - 150 215 220 215 218 50 209 150 - 130 210 220 215 215

2.2. Light stability test

The color change test after light irradiation was performed for Comparative Examples and Examples. Specifically, after 24 hours of irradiation with ultraviolet (280 ~ 400nm), the color was observed visually.

As a result of the ultraviolet irradiation, as shown in FIG. 1, there was no change in color in Comparative Examples 1, 2, 7 and Examples 1, 2, and 3, and there was no effect on light stability even when the water receiving part of the present invention was applied. Was confirmed.

On the other hand, the same test was conducted for Comparative Examples 6 and 7, except for Comparative Examples 3 to 5, which cannot be manufactured with solid cosmetics, but in the case of Comparative Example 6 due to the heat of light, the semi-solid shape completely collapsed to determine whether or not it was discolored. It was meaningless to check, and in the case of Comparative Example 7, no color change was observed.

Light irradiation condition: Solar simulator, 250~765 W/m ² Xenon lamp by Atlas

2.3. Check UV protection effect

The samples of Comparative Examples and Examples were tested and measured for UV protection 10 times each using SPF ANALAZER. As can be seen from Table 5 below, it was confirmed that Comparative Examples 1, 2 and 7 and Examples 1, 2, and 3 did not show a significant difference in terms of UV protection. This means that even when the emulsion-type solid sunscreen containing moisture of the present invention was prepared, there was no effect on the sunscreen effect or there was a slight upward phenomenon.

Analysis conditions: Labsphere UV-2000: In-vitro test

division Comparative example Example One 2 7 One 2 3 4 SPF
(before After 85.7 MED) 50.8 51.8 50.0 53.0 52.4 53.6 52.4 UVA/UVB Ratio 0.99 0.94 0.92 0.94 0.97 0.97 0.95 Average UVA PF 17.4 17.7 16.4 17.5 17.8 16.8 17.0

2.4. Water resistance test

Table 4 below is a condition for examining the water resistance test for the cosmetics of Comparative Examples and Examples. After applying 2.0mg/cm ² using PMMA PLATE with an area of 50.0 X 50.0 mm, it was obtained at 23~28℃ for about 20 minutes. And drying for 20 minutes was repeated twice to perform an In-vitro test. If the result value for water resistance, that is, the water resistance ratio, was calculated through the following equation, the results are shown in Table 5 below.

Water resistance ratio (%) =

_Within SPF _i : UV blocking index after water resistance test of each sample

SPF _i : UV blocking index of each sample

When the water resistance ratio is over 50%, it is marked as water resistance.

Sample application area Application amount Water temperature Acquisition time / drying time 50.0 X 50.0mm 2.0mg / cm ² 23~28℃ 20 minutes/ 20 minutes twice

division Comparative example Example One 2 7 One 2 3 4 Before After 85.7 MED (SPF) 50.8 51.8 50.0 53.0 52.4 53.6 52.4 SPF after receiving drying 30.6 24.8 18.2 32.1 31.6 29.8 31.0 Water resistance ratio (%) 59.44 46.85 35.10 59.81 59.53 54.75 58.37

As shown in Table 5, water resistance was shown in Comparative Example 1 without water and Examples 1, 2, and 3 containing water, but water resistance was not shown in Comparative Example 2 to which sodium stearate was applied. As a result of this test, it was confirmed that it has water resistance properties even when it contains moisture and an emulsifier. In particular, in the case of Comparative Example 7, it was confirmed that the water resistance ratio was significantly lowered, which was found to contain an excess of water and add a small amount of wax, so that external water could not be blocked from the surface of the solid cosmetic and penetrated into the cosmetic It is judged to be.

2.5. Moisture retention test

Cosmetics of Comparative Examples and Examples were prepared and molded in a 2*2*2 cm ³ square-shaped silicone mold in a liquid state before being put in a container and cooled. The initial weight of the obtained cosmetic was measured, and the weight of the cosmetic after undergoing the moisture removal process was measured as follows to check the moisture retention and shown in Table 7.

The cosmetics molded in the same size were put in a sealed oven and maintained at a temperature of 90 to 120° C. to remove moisture. The above temperature range was maintained in a state in which the balance was placed in an oven, and the experiment was conducted until the point where the experiment was kept constant without any change in weight any more, and the weight of the cosmetic composition at the end of the experiment was measured.

In addition to the cosmetics of the Comparative Examples and Examples, prepared in the same composition as in Example 3, but the cosmetic composition of Reference Example was prepared based on the contents of the polyol and water-based thickener shown in Table 6 to perform a moisture retention test.

Reference example One 2 glycerin 3.6 2.6 Butylene Glycol 2.4 1.8 Thickener Ammonium Acryl Dimethyl Taurate/VP Copolymer 0.2 0.5 Sodium polyacrylate, acrylate/C10-30 alkyl acrylate crosspolymer 0.2 0.5

division Comparative example Reference example Example One 2 7 One 2 One 2 3 4 Water retention (g) 0.05 5.01 5.22 6.98 10.22 7.59 13.01 12.66 13.21

Referring to Table 7, Comparative Example 1 was confirmed that there was little water contained in the finished solid cosmetic as water was not added, and Comparative Example 7 was added even though a small amount of wax was added and water was added in an excessive amount. Compared to the amount of water added, it was confirmed that the amount of water retention contained in the cosmetic was not large.

This is believed to be due to the fact that most of the added water is evaporated during the manufacturing process.

On the other hand, it was confirmed that the amount of moisture contained in the solid cosmetic composition was relatively higher in Examples and Reference Examples than in Comparative Examples. In particular, it can be seen that Examples 2 and 3 have a moisture retention amount of about 1.2 to 2 times that of the reference example, so that the loss of moisture in the manufacturing process is suppressed and thus included in the final cosmetic composition.

2.6. Weight loss test

Comparative Examples and Examples were prepared and filled in a sun stick container, followed by a weight loss test. The weight loss test was conducted for 7 days at 40°C -0.1 MPa, and the weight loss ratio was calculated by the following equation.

Reduction ratio (%)=

division Comparative example Reference example Example One 2 7 One 2 One 2 3 4 Reduction ratio (%) 0.18 2.40 12.5 0.22 0.21 0.24 0.21 0.19 0.10

As described above, it was observed that the cosmetic material of Comparative Example 1 and Example carried out by the manufacturing method of the present invention showed little change in weight. It was found that there was no evaporation of moisture in the cosmetic compositions of Examples, similar to Comparative Example 1 containing only oil, and Comparative Example 2 was found to have a large amount of evaporation due to evaporation of moisture on the outer skin by sodium stearate. In addition, in Comparative Example 7, it was confirmed that a large amount of moisture evaporated from the surface of the cosmetic composition as the strength of the solid cosmetic composition was not large while containing an excessive amount of moisture.

2.7. Long-term loss test

The above experiment 2.6. It was performed in the same manner as performed in, but the reduction ratio after 1 month and 3 months elapsed under the conditions of 35°C -0.1 MPa was calculated and shown in Table 9.

Reduction ratio (%) Comparative example Reference example Example One 2 7 One 2 One 2 3 4 1 month 0.19 7.41 14.01 3.31 3.22 3.36 2.89 3.77 2.33 3 months 0.19 8.19 14.33 5.14 4.99 5.31 4.33 5.26 3.21

Compared with Comparative Example 1 in which no water was added, the long-term loss test results of Examples and Reference Examples were confirmed to be excellent. In the case of Comparative Example 7, the amount of water evaporated was large as an excess of water was added, and it was confirmed that most of the water evaporated initially.

Both the Example and the Reference Example were confirmed to be at a good level, but in the case of Example 4, it was confirmed that in particular, the water retention amount was not lost for a long period of time even though the water retention amount was large.

As described above, it is determined that the moisture-repellent coating layer formed on the surface of titanium dioxide suppresses evaporation of moisture.

2.8. Sensory test

30 female panels aged 25-45 years old were divided into two groups, and Comparative Examples, Reference Examples, and Examples were appropriately adjusted in each group to be used on both faces, and then the stickiness felt when applied according to the following evaluation criteria , Adhesion, makeup fixer ability, refreshing feeling and overall satisfaction were evaluated and the results are shown in Table 9 below.

Among the above criteria, stickiness refers to a property that leaves a lot of residual feeling with an oily feeling left after spreading it on the skin, and the less sticky it is, the more suitable cosmetic composition for sun care cosmetics. Adhesion refers to the feeling that the composition adheres to the skin by applying it to the skin thinly when applied to the skin. Make-up fixer ability refers to the degree to which the make-up does not slip off when applying base makeup such as foundation after applying the stick formulation, and the persistence. The refreshing sensation represents the moisture and coolness felt when the stick formulation is applied. Such standards increase the value of use as a cosmetic and can be an important feature of UV-blocking functional cosmetics.

<Evaluation criteria>

More than 24 women judged excellent: ◎

18-23 women judged excellent: ○

10-17 women judged as excellent: △

10 or fewer women judged excellent: X

division Comparative example Reference example Example One 2 7 One 2 One 2 3 4 Sticky ○ X △ ◎ △ ◎ ○ △ ○ Adhesion ◎ ○ X ○ ○ ◎ ◎ ◎ ◎ Makeup fixer ◎ ○ X ○ ○ ○ ◎ ◎ ◎ Refreshing X X X △ ○ ◎ ◎ ○ ◎ Overall satisfaction △ X X ○ ○ ◎ ◎ ○ ○

As shown in Table 10, it was found that Examples 1 and 2 had high satisfaction. In Examples 3 and 4, overall satisfaction was good, but in Comparative Example 1, there was no moisture, so the refreshing sensation was not felt, but Comparative Example 2 to which moisture was added was found to have poor overall satisfaction due to the sticky feeling. Compared to the product manufactured by the method of the present invention, the product to which water was added using the existing anhydrous formulation and sodium stearate tended to be less satisfied with the feeling of use.

The reference example was somewhat inferior in satisfaction to the example, but was found to be at a better level than the comparative example. Reference Example 1 was confirmed to be slightly inferior to the refreshing sensation, but was confirmed to be very excellent compared to the comparative example. In Reference Example 2, it was confirmed that the stickiness was somewhat inferior. Specifically, it was confirmed that the feeling of use was reduced as the residual feeling of the cosmetic material was felt large on the skin surface by applying it thickly.

Although the preferred embodiments of the present invention have been described in detail above, the rights of the present invention are not limited thereto, and various modifications and improvements of the person skilled in the art using the basic principles of the field of the present invention defined in the claims It also belongs to the scope of the present invention.

Claims (8)

As a solid sunscreen cosmetic composition,
Including 15 to 30% by weight of the aqueous phase component, 5 to 35% by weight of the sunscreen component, 15 to 27% by weight of oil, 15 to 30% by weight of wax, and 0.05 to 3% by weight of emulsifier based on the total weight of the composition,
The sunscreen component is an inorganic sunscreen or a mixture of an organic sunscreen and an inorganic sunscreen,
The inorganic sunscreen is at least one selected from the group consisting of titanium dioxide and zinc oxide,
The inorganic UV blocker has an average particle diameter of 0.1 to 100 μm (micrometer), and has a core-shell structure in which a moisture-repellent coating layer is formed on the surface,
The moisture-repellent coating layer is a solid UV-blocking cosmetic composition comprising a mixture of a pH adjuster, an aqueous thickener, and caprylic/caprylglyceride in a weight ratio of 1: 2: 10 to 30. The method of claim 1,
The aqueous component is a solid sunscreen cosmetic composition comprising at least one selected from the group consisting of water, polyol, and aqueous thickener. The method of claim 2,
The aqueous component is water or a polyol/aqueous thickener aqueous solution,
The polyol/water-based thickener aqueous solution is a solid UV-blocking cosmetic composition, characterized in that a mixture of water, a polyol, and an aqueous thickener in a weight ratio of 10 to 16: 3 to 7: 0.1 to 0.8. delete The method of claim 1,
The solid sunscreen cosmetic composition is a solid sunscreen cosmetic composition, characterized in that the formulation is a compact type, a stick type, a balm type, or a bar type. The method of claim 2,
The polyol is glycerin, glyceres-26, propylene glycol, butylene glycol, dipropylene glycol, methylgluces-10, methylgluces-20, PEG-8, PEG-32, PEG -75, may be one or more selected from the group consisting of raffinose, inositol, sorbitol and maltitol,
The aqueous thickener is sodium polyacrylate, acrylate/C10-30 alkyl acrylate crosspolymer, ammonium acryloyl dimethyl taurate, ammonium acrylate copolymer, VP copolymer, acrylate copolymer, and glyceryl acrylate. Solid sunscreen cosmetic composition, characterized in that at least one selected from the group consisting of. delete As a method for producing a solid sunscreen cosmetic composition according to any one of claims 1 to 3, 5 and 6,
A heating and mixing step of heating and mixing the oil phase part including the UV blocking component, oil, wax and emulsifier and the water phase part including the water phase component, respectively;
An emulsification step of obtaining an emulsified emulsion by placing the mixed oil phase portion and the mixed aqueous phase portion obtained in the heating and mixing step into a single container and heating and stirring;
A cooling step of degassing and cooling the emulsion obtained in the emulsification step to obtain a cooled product; And
A filling step of heating the coolant obtained in the cooling step to fill the container and cool it; Method for producing a solid sunscreen cosmetic composition comprising a.

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